His rival is the character Holden because he kind of likes Bulma and Vegeta is Bulma's husband. Vegeta has fused with Holden though in the final saga of the game because all of the villains fused together was too powerful so all of the heroes including Vegeta and his rival fused together. Vegeta is powerful enough to obtain almost all of the Super Saiyan forms except one and the one he can't obtain is the Infinity Super Saiyan form. He can't obtain the form is because he isn't powerful enough to achieve the form. Vegeta and Goku have been rivals for a long time but they became friends when they first fused. Vegeta and Goku fused using the Potara Earings and the Fusion Technique. Vegeta is a very powerful Saiyan and is a full-blooded one. Vegeta has performed team attacks with Goku, Goku Jr